cell structure

Question 1

name one type of animal cell that does not have mitochondria

Answer 1

red blood cell

Question 2

t or f, an animal cell will burst if placed in a concentrated sugar solution

Answer 2

false (will shrink)

Question 3

define eukaryotic + prokaryotic

Answer 3

eukaryotic: has nucleus + membrane bound organelles
prokaryotic: has no nucleus/ or membrane bound organelles

Question 4

what stain did you use to look at cells under the microscope?

Answer 4

iodine (plants) or methylane blue (animal)

Question 5

what is the benefit of using a stain?

Answer 5

makes the cell easier to see

Question 6

name 5 organelles/features of a plant cell

Answer 6

chloroplast, vacuole, cytoplasm, cell wall, cell membrane, mitochondria

Question 7

name 5 organelles/features of an animal cell

Answer 7

cell membrane, nucleus, ribosome, mitochondria, cytoplasm

Question 8

what is the cell membrane composed of?

Answer 8

phospholipids + proteins

Question 9

what are phospholipids made of?

Answer 9

water loving phosphate group, water hating lipid.

Question 10

how is the cell membrane arranged?

Answer 10

bi-layer, phosphates exposed on the outside, lipids in the middle

Question 11

name 3 functions of the cell membrane

Answer 11

retains cell contents, controls what enters/leaves the cell (selectively-permeable), gives slight support

Question 12

t or f, mitochondria have a double membrane

Answer 12

true

Question 13

name 3 features of a cholorplast

Answer 13

sometimes have dna, granum, thylakoid discs, starch grain

Question 14

function of ribosomes?

Answer 14

to produce proteins

Question 15

function of mitochondria

Answer 15

site of respiration, supplies energy to the cell.

Question 16

3 differences between plant + animal cells

Answer 16

plant cells have cell walls, chloroplasts, chlorophyll
animal cells do not have these

Question 17

how did you examine plant cells under the microscope?

Answer 17

• forceps to peel a thin layer of onion
• place small piece of onion on a slide
• add a few drops of iodine
• add coverslip at 45 degree angle to eliminate bubbles
  -use coarse/fine adjustment wheel to focus the image

Question 18

how did you examine animal cells under the microscope

Answer 18

• scrape inside of your mouth with cotton swab to collect cheek cells
• spread the cells onto a glass slide
• add few drops of methylane blue
• add coverslip at a 45 degree angle to eliminate bubbles
• use coarse/fine adjustment wheel to focus the image

Question 19

explain the structure of a mitochondria

Answer 19

has a double membrane. has infoldings called cristae. the gaps between these infoldings is called the matrix. the more infoldings the mitochondira has, the more energy that can be produced

Question 20

what are ribosomes made of

Answer 20

they are made of RNA and protein